:root {
  --plum: #5B2A86;
  --plum-deep: #431F65;
  --rose: #E8B7D4;
  --coral: #F15A5A;
  --ink: #1F1533;
  --ink-soft: #333145;
  --mist: #F7F4F9;
  --bg: #FFFFFF;
  --line: rgba(31, 21, 51, 0.08);
  --line-strong: rgba(31, 21, 51, 0.14);
  --shadow-sm: 0 2px 8px rgba(31, 21, 51, 0.06);
  --shadow-md: 0 10px 30px rgba(31, 21, 51, 0.12);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --serif: "DM Serif Display", "Playfair Display", Georgia, serif;
  --sans: Inter, "Helvetica Neue", system-ui, sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-soft);
  font-family: var(--sans);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-image:
    radial-gradient(1000px 600px at 85% -10%, rgba(232, 183, 212, 0.35), transparent 60%),
    radial-gradient(900px 500px at -10% 12%, rgba(91, 42, 134, 0.06), transparent 65%);
  background-repeat: no-repeat;
}

img { max-width: 100%; display: block; }

a {
  color: var(--plum);
  text-decoration: none;
  border-bottom: 1px solid rgba(91, 42, 134, 0.35);
  transition: color 160ms ease, border-color 160ms ease;
}
a:hover { color: var(--plum-deep); border-bottom-color: var(--plum-deep); }
a:focus-visible {
  outline: 2px solid var(--plum);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
}

h1, h2, h3 {
  font-family: var(--serif);
  color: var(--ink);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.12;
  margin: 0 0 16px;
}

h1 { font-size: clamp(36px, 6vw, 64px); line-height: 1.05; }
h2 { font-size: clamp(28px, 4vw, 42px); }
h3 { font-size: 22px; line-height: 1.2; }

p { margin: 0 0 16px; }

.eyebrow,
.section-kicker,
.card-eyebrow {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--plum);
  margin: 0 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before,
.section-kicker::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--plum);
  opacity: 0.8;
}

/* --- Header --- */
.site-header {
  padding: 22px 0 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand { border: 0; }
.brand-logo {
  height: 34px;
  width: auto;
}
.header-meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}
.header-meta-text {
  display: none;
}
.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 0 4px rgba(241, 90, 90, 0.15);
  animation: softPulse 2.2s ease-in-out infinite;
}
@keyframes softPulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 4px rgba(241, 90, 90, 0.15); }
  50% { transform: scale(1.12); box-shadow: 0 0 0 7px rgba(241, 90, 90, 0.08); }
}

/* --- Hero --- */
.hero {
  padding: 72px 0 56px;
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}
.hero-copy h1 { color: var(--ink); }
.lede {
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 58ch;
  margin-top: 8px;
}
.hero-ctas {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}
.cta-aside {
  font-size: 14px;
  color: var(--ink-soft);
  opacity: 0.8;
}

.btn {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.01em;
  padding: 14px 22px;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
  min-height: 44px;
  line-height: 1.2;
}
.btn-primary {
  background: var(--plum);
  color: #fff;
  box-shadow: var(--shadow-sm);
  border-bottom: 0;
}
.btn-primary:hover {
  background: var(--plum-deep);
  color: #fff;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  border-bottom: 0;
}
.btn-large { padding: 16px 28px; font-size: 16px; }

/* Hero card + heart */
.hero-card {
  background: linear-gradient(180deg, #FBF4F7 0%, #F3E6EE 100%);
  border-radius: var(--radius-lg);
  padding: 36px 28px 28px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(91, 42, 134, 0.08);
}
.hero-card::before {
  content: "";
  position: absolute;
  top: -60px; right: -60px;
  width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(241, 90, 90, 0.18) 0%, transparent 70%);
  pointer-events: none;
}
.heart-stage {
  position: relative;
  height: 220px;
  display: grid;
  place-items: center;
}
.heart {
  width: 140px;
  height: auto;
  fill: var(--coral);
  filter: drop-shadow(0 8px 18px rgba(241, 90, 90, 0.35));
  transform-origin: center;
  animation: beat 1.4s ease-in-out infinite;
  position: relative;
  z-index: 2;
}
@keyframes beat {
  0%, 60%, 100% { transform: scale(1); }
  20% { transform: scale(1.08); }
  40% { transform: scale(0.97); }
}
.pulse-ring {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 160px; height: 160px;
  margin: -80px 0 0 -80px;
  border: 1px solid rgba(91, 42, 134, 0.25);
  border-radius: 50%;
  animation: ripple 2.4s ease-out infinite;
  z-index: 1;
}
.pulse-ring-2 {
  animation-delay: 1.2s;
  border-color: rgba(241, 90, 90, 0.25);
}
@keyframes ripple {
  0% { transform: scale(0.6); opacity: 0.9; }
  100% { transform: scale(1.6); opacity: 0; }
}
.hero-card-foot {
  text-align: center;
  margin-top: 10px;
}
.hero-card-label {
  font-family: var(--serif);
  font-style: italic;
  font-size: 18px;
  color: var(--plum);
}

@media (prefers-reduced-motion: reduce) {
  .heart, .pulse-ring, .pulse-ring-2, .dot { animation: none !important; }
}

/* --- Sections --- */
section { padding: 72px 0; }
.observed { padding-top: 24px; padding-bottom: 24px; }

.observed .sources {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}
.observed .sources li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.src-name {
  font-family: var(--serif);
  font-size: 17px;
  color: var(--ink);
}
.src-note {
  font-size: 14px;
  color: var(--ink-soft);
  opacity: 0.85;
}

/* Thesis */
.thesis {
  background: linear-gradient(180deg, #FBF8FC 0%, #FFFFFF 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.thesis-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}
.thesis-right p { max-width: 60ch; }

/* Layers */
.section-heading { margin-bottom: 12px; }
.section-sub { max-width: 70ch; color: var(--ink-soft); margin-bottom: 36px; }

.layers-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.layer {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 26px 24px 22px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}
.layer:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--line-strong);
}
.layer::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--plum), var(--rose));
}
.layer:nth-child(3)::before { background: linear-gradient(180deg, var(--plum), var(--coral)); }
.layer-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 10px;
  gap: 12px;
}
.layer-pct {
  font-family: var(--serif);
  font-size: 40px;
  color: var(--plum);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.layer-tag {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  opacity: 0.75;
}
.layer h3 { color: var(--ink); margin-bottom: 8px; }
.layer p { margin: 0; font-size: 15.5px; }

.layers-foot {
  margin-top: 28px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 19px;
  color: var(--plum);
  max-width: 62ch;
}

/* Engagement */
.engagement {
  background: var(--mist);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.engagement-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}
.engagement-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 28px 26px;
  box-shadow: var(--shadow-sm);
}
.card-eyebrow { margin-bottom: 10px; }
.card-list {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
}
.card-list li {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
}
.card-list li:last-child { border-bottom: 0; }
.li-k {
  font-weight: 500;
  color: var(--plum);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding-top: 2px;
}
.li-v { color: var(--ink-soft); }
.card-foot {
  font-size: 13px;
  color: var(--ink-soft);
  opacity: 0.8;
  margin: 0;
}

/* Paper */
.paper {
  padding: 64px 0;
}
.paper-grid {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  align-items: start;
  padding: 28px 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.paper-icon {
  color: var(--plum);
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  background: var(--mist);
  border-radius: 12px;
}
.paper-icon svg { display: block; }
.paper-copy h2 { margin-bottom: 10px; font-size: 28px; }
.paper-links {
  font-family: var(--sans);
  font-size: 14px;
  margin-top: 10px;
}
.dotsep { margin: 0 10px; color: var(--line-strong); }

/* Partner line */
.partner {
  padding: 24px 0 48px;
}
.partner-line {
  font-family: var(--serif);
  font-style: italic;
  font-size: 19px;
  color: var(--ink);
  max-width: 70ch;
  margin: 0 auto;
  text-align: center;
  padding: 28px 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* CTA */
.cta {
  background: linear-gradient(160deg, #3A1A5A 0%, #5B2A86 55%, #7A3FAE 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute;
  top: -80px; right: -80px;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(241, 90, 90, 0.35) 0%, transparent 70%);
}
.cta::after {
  content: "";
  position: absolute;
  bottom: -120px; left: -60px;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 183, 212, 0.25) 0%, transparent 70%);
}
.cta .section-kicker { color: var(--rose); }
.cta h2 { color: #fff; font-size: clamp(32px, 5vw, 48px); margin-bottom: 12px; }
.cta p { color: rgba(255, 255, 255, 0.9); max-width: 58ch; }
.cta-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: end;
  position: relative;
  z-index: 1;
}
.cta-action .btn-primary {
  background: #fff;
  color: var(--plum);
}
.cta-action .btn-primary:hover {
  background: var(--rose);
  color: var(--plum-deep);
}
.cta-who {
  margin: 14px 0 2px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
}
.cta-link { margin: 0; font-size: 13px; }
.cta-link a {
  color: var(--rose);
  border-bottom-color: rgba(232, 183, 212, 0.5);
}
.cta-link a:hover { color: #fff; border-bottom-color: #fff; }

/* Footer */
.site-footer {
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
  background: #fff;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: flex-start;
}
.footer-prep {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
}
.footer-meta {
  font-size: 13px;
  color: var(--ink-soft);
  opacity: 0.7;
  margin: 0;
}

/* --- Responsive upgrades --- */
@media (min-width: 560px) {
  .header-meta-text { display: inline; }
}
@media (min-width: 720px) {
  .hero-grid {
    grid-template-columns: 1.25fr 1fr;
    gap: 56px;
  }
  .thesis-grid {
    grid-template-columns: 1fr 1.4fr;
    gap: 48px;
  }
  .engagement-grid {
    grid-template-columns: 1.1fr 1fr;
    gap: 48px;
  }
  .layers-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .observed .sources {
    grid-template-columns: repeat(2, 1fr);
    gap: 4px 40px;
  }
  .cta-inner {
    grid-template-columns: 1.4fr 1fr;
    gap: 48px;
  }
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}
@media (min-width: 980px) {
  .hero { padding: 96px 0 72px; }
  section { padding: 96px 0; }
  .wrap { padding: 0 32px; }
}

/* Small screens (375px baseline) */
@media (max-width: 374px) {
  .wrap { padding: 0 20px; }
  .heart-stage { height: 180px; }
  .heart { width: 120px; }
}